{
  "manageEntity": {
    "action": "Save",
    "entityId": "2091786493",
    "entityType": "Track",
    "nonce": "0x9796e846720b95b4621645528951212430478eac4960b4516e2a21a7780e13e1",
    "signature": "0x9c8d2669d68afe8190bd254b838e4e71d7eaa180ed89e7241ed00e7e9c8c7e5628d8860398c152612b023149599e8a4650f613f8c9061e8ca76d9441f204458d1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}